Rotary pump with radial inlet and outlet



Sept. 23, 1952 WAHLE ROTARY PUMP WITH RADIAL INLET AND OUTLET Filed Jan. 2, 1946 I INVEN TOR. H001. PH n/flhLf Patented Sept. 23, 1952 UNITED STATES ROTARY PUMP WITH RADIAL INLET AND OUTLET Adolph Wahle, Davenport, Iowa, assignor, by direct and mesne assignments, of one-half to W. H. Martin, Davenport, Iowa Application January 2, 1946, Serial No. 638,607.

6 Claims. (Cl. 103--96) My present invention pertains to improvements in rotary pumps and, among the objects thereof, are the provision of an efficient pump of the type indicated; the provision of a pump of the type indicated in which end thust of the rotor is eliminated; the provision of a pump of the type indicated in which the pressures upon the two faces of a rotary web connecting the vanes are balanced so that there is no end thrust of the rotor against either head of the rotor housing; and such further objects, advantages, and capabilities as will hereafter appear and as are inherent in the construction disclosed herein. My invention further resides in the combination, construction, and arrangement of parts illustrated in the accompanying drawings and, while I have shown therein what is now regarded as the preferred embodiment of this invention, I desire the same to be understood as illustrative only and not to be interpreted in a limiting sense.

In the drawings annexed hereto and forming a part hereof,

Fig. 1 represents a side elevation of my improved pump, partly in section, to show the interior arrangement thereof;

Fig. 2 represents an end view taken from the right hand side of the structure shown in Fig. 1;

Fig. 3 represents a vertical, substantially central section in the axial plane of the rotor of this pump, taken along the plane indicated by the line 33 in Fig. 1;

Fig. 4 represents an inner face elevation of one-half of one of the heads of the pump;

Fig. 5 represents an inner face elevation of onehalf of the other head; I

Fig. 6 represents a side elevation of the rotor detached from the pump housing;

Fig. 7 represents an end view of the structure shown in Fig. 6; and

Fig. 8 represents an elevational view of the opposite face of the rotor from that shown in Fig. 6.

Reference will now be made in greater detail to the annexed drawings for a more complete description of this invention. The body I of the rotor housing or casing is provided with suitable means for connecting the body and its two heads '2 and 3 together in Water-tight relation. These heads are shaped for the mounting of suitable shaft bearings 4 and 5 which are not shown in detail, inasmuch as they are of standard construction. The shaft or axle B is adapted to have any suitable source of power connected thereto for the rotation of the hub 1 upon which the rotor is mounted,.the two being connected to- .gether so that rotation of the shaft will cause rotation of the rotor. In the drawings, the space between the rotor and the housing is exaggerated for the sake of clarity of disclosure.

The inner face of the head 2, facing the rotor, is preferably flat and smooth and is spaced slightly from the web 8 of the rotor. On one face of the web are shallow blades 9 of parallelogram form which are adapted to have a runnin fi. with the inner face of the head 2. The blades it! upon the other side of the web 8 are trapezoidal in form, being deeper next to the hub l and more shallow at the outer periphery of the rotor.

The inner face of the head 3 has a stop I! formed thereon with the inner face of which the blades or vanes of the rotor l0 have a running fit so that leakage between the rotor and the stop will be substantially nil. It is clear that the ends of the hub I should fit closely enough against the heads 2 and 3 that end play will be eliminated, or substantially so. The fluid entering the inlet [2 is picked up by the blades of the rotor and carried around thereby as it rotates. Because of the decreasing carrying capacity of the volute [3, there is a compressive force exerted upon this fluid with the result that fluid will be forced through the openings M in the web 8, resulting in an equal pressure upon opposite sides of this web. Consequently, there is such a balanced pressure on this web that there is no tendency toward an end thrust in connection with the rotor and,

therefore, substantially no wear of the two ends; of the hub or the heads 2 and 3 where the hubbears against them. The liquid is carried around, by the rotor and discharged under pressure.- through the outlet l5. The inlet l2 and the out let l5 communicate with the interior of the rotor housing only at the side of the web 8, carrying the larger or trapezoidal vanes it. This is due to the construction wherein, as best shown in Figs. 2 and 3, the inner side walls l2a and i511 of the inlet and outlet lie substantially in the plane of the right hand face 8a (see Fig. 3) of the rotor web 8 and, since the web 8 has a running fit with the interior of the rotor housing body I, the space at the side of the web 8 carrying the vanes 9 is entirely out of communication with either the inlet l2 or the outlet [5.

While I have disclosed herein what is regarded as the preferred embodiment of this invention, it will of course be understood that the specific description of structure set forth may be departed from by various modifications without departing from the spirit of this invention as disclosed herein and as defined in the appended claims.

Having now described my invention, I claim:

1. In a rotary pump, a casing having peripheral inlet and outlet openings and heads, a rotor in the casing having a hub and having a web arranged at a right angle to the axis of rotation of the rotor, there being radial vanes on opposite sides of the web, the vanes defining compartments and the vanes being of trapezoidal form upon one side of the web, the vanes at the second side of the web being of parallelogram form with their maximum dimension extending radially from the rotor hub, the radially inner edge of each vane, on the first side of the web, being connected to the rotor hub and the radially outer edge being at the periphery of the rotor, the web of the rotor being provided, adjacent the hub, with openings which connect the compartments upon opposite sides of the web so that liquid may flow therethrough from side to side of the rotor, whereby to balance the end thrusts upon the two faces of the web, the rotor having a shaft supported by the heads of the casings, the said inlet and outlet to the compartments being entirely at one side of the web, and a stop on the head, at the inlet side of the pump, between the inlet and outlet, so that the trapezoidal vanes run close to the stop, whereby inlet of fluid is confined to the inlet side of the pump, and outlet of fluid is confined to the outlet side of the pump.

2. A rotary pump comprising a housing having a peripheral inlet, a peripheral outlet, and heads, a rotor in the housing having an axle, a hub surrounding the axle, and a web, connected to the hub, arranged at substantially a right angle to the axle, the axle being supported in the heads, said web being spaced slightly from one head of the housing and being spaced much farther from the second head of the housing, providing a smaller and a larger cavity in the housing, vanes on both sides of the web connecting the web and the hub of the rotor, said web having openings therethrough closely adjacent the hub for the passage of fluid from one side to the other of the web, the connections between the interior of the housing and the inlet and outlet openings being both wholly upon the same side of the web and connecting only the larger part of the housing cavity and the inlet and outlet openings, and a stop member on the inner face of the head facing the larger part of the housing interior and completely separating the inlet and outlet openings.

3. A rotary turbine pump having its rotor balanced against end thrust, the pump having a casing with fixed heads and peripheral inlet and outlet openings for the entry and discharge of fluid, the pump rotor comprising an axle supported in the heads, a hub tightly connected thereto, a web extending outwardly from the hub at substantially a right angle to. the axle, and vanes upon both sides of the web extending radially outwardly from the hub, the web having openings therethrough between the vanes closely adjacent the hub and connecting spaces between the vanes upon opposite sides of the web, the spaces between the vanes, upon one sideof the web, having connection with the inlet and outlet openings only through the openings in the web, the vanes upon that side of the web, separated from the inletand outlet openings, extending. laterally from the web but a short distance, and the vanes upon the opposite side of the web being trapezoidal in form and extending much farther lengthwise of the hub, where connected to the 4 hub, than the vanes upon the opposite side of the web.

4. In a rotary turbine pump in which the rotor is balanced against end thrust, a housing having peripheral inlet and outlet openings, the internal circumferential wall of the housing being substantially cylindrical, said housing having the inner face of one end fiat and the inner face of the other end a flattened frustum of a cone, said inner face of said other end having a stop thereon located between the inlet and outlet openings of the housing to prevent passage of liquid from one to the other of said openings, said stop being triangular in section longitudinally of the housing and projecting into the space between the rotor and the housing to separate the fluid entering the housing from that leaving, the rotor comprising a hub, radial blades, and a web arranged perpendicularly to the rotor axis, the blades being on opposite sides of the web and attached to the hub and web and those on one side of the web being rectangular in form and having a running fit with the flat face of the housing, the blades on the other side of the web being trapezoidal in form with their shortest side at the periphery of the rotor, and the web of the rotor having holes therethrough adjacent the hub and between the vanes to permit passage of fluid between the spaces on opposite sides of the web, the spaces between the rectangular blades having connection with inlet and outlet openings only through the web openings, the rectangular blades having a length, longitudinal of the pump, which is the minimum requisite to furnish a balancing fluid pressure sufficient to reduce end thrust of the rotor substantially to zero.

5. A rotary turbine pump comprising a housing having a peripheral inlet opening, a peripheral outlet opening, heads, a rotor having vanes upon opposite sides thereof, a stop fitting close to the vanes and located between the inlet and outlet openings and fitting close to the rotor to limit circulation of liquid in the housing, said rotor having an axle, a hub, and a web arranged at substantially a right angle to the axle, hearings in the heads, said bearings and axle supporting the rotor for rotation, said web being spaced slightly from one head of the housing and being spaced much farther from the second head of the housing, the vanes and the web defining compartments, the vanes on opposite sides of the web being arranged oppositely from each other in axial alignment and connecting the web and the hub of the rotor, said web having openings therethrough for passage of fluid from one side to the other of the web, both of said inlet and outlet openings communicating with the interior of said housing between the plane of the Web and the second head, the pressurein the compartments of the rotor more remote from the inlet increasing as the rotor rotates about its axis, and the pressure in two opposite compartments upon opposite sides of the web being substantially equal.

6. A rotary pump having a casing including a peripheral inlet and a peripheral outlet, heads at opposite ends of said casing, a rotor in said casing journaled for rotation in said head, said rotor including a web arranged at a right angle to the axis of rotation of the rotor and a hub extending substantially from one head to the other, said web being appreciably closer' to one head than to'the other, radial vanes carried by said web at one side thereof and between the web and said one head, said vanes having their maximum dimension extending radially from the rotor hub, and a second set of radial vanes carried by said web at the secondside of the web, each having a trapezoidal shape with its wider edge adjacent said hub, said web shaving openings extending therethrough to establish communication between opposite sides of the web, said inlet and said outlet opening into the interior of said casing entirely at the side of said rotor Web at which said trapezoidal vanes are situated.

ADOLPH WAHLE.

REFERENCES CITED The following references are of record in the file of this patent:

Number Re. 14,988 359,096 0 1,640,591 2,073,014 2,113,116

10 Number 6 v UNITED STATES PATENTS Name Date Parsons Nov. 16, 1920 Richards Mar. 8, 1887 Borneman Aug. 30,1927 Jennings Mar. 9,1937 McMillan Apr. 5, 1938 FOREIGN PATENTS Country Date Great Britain Dec. 22, 1911 Germany Aug. 3, 1933 

